Nailing-machine



A. B. TOZER.

NAILING MACHINE.

APPLICATION FILED JUNE 21,1917.

Patented 1111107, 1921.

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A. B. TOZERQ NAlLlNG MACHINE.

APPLICATION FILED JUNE 2|, 1917.

1,380,690, Patented June 7, 1921.

3 SHEETS-SHEET Z- A. B. TOZER.

NAILING MACHINE; APPLICATION FILED JUNE 21,1917- l,380,69@. Patented June 7,1921.

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ARCHIBALD B. TOZER, OF ERIE, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGN- MENTS, TO REED MANUFACTURING COMPANY.

NAILINGr-IVIACHINE.

Application filed. June 21, 1917.

T all whom it may concern:

Be it known that I, AROHIBALD B. Toznn, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Nailing-liachines, of which the following is a specification.

This invention relates to nailing machines and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

The nailing machine is particularly designed for nailing baskets and as shown is arranged for this purpose.

The invention is illustrated in the accompanying drawings as follows Figure 1 shows a front elevation of the machine, a part being broken away.

Fig. 2 is a similar elevation with parts in section to better show construction.

Fig. 3 is a plan view of the foot pedals and devices directly actuated thereby.

Fig. 4 is a section on the line 4-4 in Fig. 2.

Fig. 5 is a side elevation of one of the cam actuating yokes.

The nailing machine as distinct from-the mechanism for actuating it is similar to that shown in an application now pending filed by Edwin J. Youngs, Serial Number 857,855, Aug. 21, 1914, basket machines.

1 marks the frame, 2 the hammer carrier, 3 the shaft on which the hammer carrier is journaled, 4 the hammer, 5, 6 and 7 a series of gears, the gear 5 being stationary, the gear 6 being carried by the swinging arms and the gear 7 being fixed with the hammer, the purpose of these gears being to maintain the hammer in a vertical position as it is swung from the nail feeding device to the work. A pulley 8, preferably cam-shaped 1s fixed on the shaft 3. A chain 9 runs over the pulley 8 to the operating devices. Pressure on the chain in one direction moves the hammer to driving position and pressure on the chain in the opposite direction retracts the hammer. The hammers are in duplicate, the hammer at the left having similar parts to those just described but with the parts 2,

3 4 5 6 7, S and 9 corresponding to the parts 2, 3, 4, etc., of the hammer to the.

right, the only difference being that the parts at the right are reversed from those at The basket support 10 is provided with Specification of Letters Patent.

Patented June 7, 1921.

Serial No. 176,069.

the points 11 for holding a bottom. The bottom is driven into position by the head 12. The head 12 is carried by a sliding shaft 13 mounted in the bearings 14. A lever 15 1s fulcrumed at 16 and operates upon a block 16? on the shaft 13 to force it forward to drive a bottom on to the points 11. The basket form 10 is slidably and rotatively mounted, the shaft providing for the rotative movement being carried by the bearing 17 and the guide 18 providing for the sliding movement to bring the form into proper position under the hammers.

The chains 9 and 9 are connected to the levers 19 and 19*,thelevers being mounted at 20 and 20. Links 21 and 21* connect the levers 19 and 19 with the levers 22 and 22. The lever 22 is pivotally mounted at 23 and the lever 22 is similarly mounted, these parts being practically in duplicate. Rollers 24 and 24 are arranged on the levers 22 and 22 and ride the cams 25 and 25 A drive shaft 26 is journaled in the bearings 27 mounted on the frame and is driven by a pulley 28. The cams 25 and 25 are actuated by similar mechanism except that these mechanisms are reversed and a description of one of them, therefore, will suflice for both. A clutch member 29 is fixed on the camwhich for convenience I call the hammer cam. The companion member 30 of the clutch is slidingly mounted on the shaft 26 but locked against rotation thereon by means of the spline 31. A collar 32 is fixed in a groove 33 on the member 30 and a yoke 34 is pivotally secured to the collar 32 and pivotally mounted in a hanger 36 locked against rotation but hung on the shaft 26. An arm 37 extends from the lower end of the yoke 34 and a latch 38 is pivotally mounted in this arm. A link 39 is pivotally secured to the latch by a pin 40 and to a pedal lever 42 by a pin 41. The pedal levers 42 are pivotally mounted on a shaft 43 which is secured to a part of the frame 44. A link 45 connects the pedal lever 42 with the pedal 46. The pedals are pivotally mounted on a rod 47 arranged in the frame. A spring 48 extends from an arm 49 projecting from the latch 38 to an arm 50 on the pedal 42 of the opposite hammer system. As a result the spring holds the latch 38 yieldingly upward and also the opposite pedal lever 42in an upward position.

therefore rotates with the hammer cam. This cam engages the latch 88 when it is in its upper position and forces the latch toward the side of the machine. This operating through the yoke carries the clutch member out of engagement with the clutch -member 29 and consequently breaks the driving connection between the shaft 26 and the cam 25. A stop 51 contacts the latch after the clutch is disengaged so as to accurately arrest the cam at a pre-determined point.

Springs 52 extend from the levers 22 and 22" to the arms 53 on the part 44: of the frame. The part 4A: has a buffer 54 and the levers 22 and 22 have stop screws 55 by means of which the extent of the downward movement of the levers 22 and 22 may be adjusted. Set screws 56 are also arranged in the arms 53, these engaging the pedals and limiting their upward movement.

The cam has a step 57 which is so arranged as to pass under the wheel 24: just after the latch 38 is drawn down and the cam started. As the wheel 24 passes off the step 57 the spring 52 brings down the lever 22 and this operating through the links, levers and chain, swings the hammer forward to drive a tack at the basket form. The continued movement of the cam picks up the roller 2i and gradually elevates the lever 22, the highest point on the cam 58 bringing the hammer into position to pick up the tack bringing the hammer to the na1l feeding device 59 in order to pick up the tack or nail 6O therefrom. Preferably there is a slight dwell at 58 so as to assure the proper engagement of the nail, the hammer 4 being in the form of a U-shaped magnet for the purpose of picking up such tack. hen the cam reaches the point 61 it is of slightly less diameter than at 58 and consequently brings the hammer l slightly away from the nail feeding device and holds it in this position.

The hammer is retracted as the lever 22 or 22 is arrested by means of the springs 62 and 62 operating on the opposite sides of the chains 9 and 9 from the levers 22 and 22. The spring 62 should be suiticiently strong to take up the slack as the cam 25 lifts the lever. It should have very much less strength than the spring 52 inasmuch as the spring 52 not only has to drive the tack but also to overcome the spring 62.

In the operation of the machine, the operator presses one pedal or the other, depending upon the hammer he wishes to 0perate. A compression of the pedal depresses the latch 88 and releases it out of the path of the stop 51 The spring 48 acting through the latch, however, then carries the yoke 34 and with it the clutch member 30 so as to bring it into engagement with the clutch member 29. The cam then starts to rotate with the cycle of movements on the hammer as above described. When the roller 24: passes off the step 57 the hammer swings under the influence of the spring 52 to drive a nail. With a continued movement of the cam, the lever 22 is lifted and the hammer retracted by means of the spring 62. If the pedal is released prior to the completion of the rotative movement of the cam 51 with its stop 51 the cam will operate on the latch 88 to throw the clutch out of engagement so that the hammer will not repeat. If, however, the pedal is maintained in its depressed position the latch 38 will. be out of the path of the cam 51 and consequently the cam 25 will continue to rotate and the hammer continue to oscillate.

It is important that the hammer should be moved with uniform velocity in driving tacks, especially where used on frail material, such as baskets, otherwise there would be danger of cutting the material through the force of the blow. On the other hand, the hammer should have suificient velocity to drive the tack or nail uniformly and in some parts of the work to clench it. It is particularly desirable to be able to drive the machine at different rates of speed so as to accommodate different operators. In this machine this is possible because the hammer is driven by the spring and the velocity at which the machine is driven does not change the velocity with which the hammer is moved. It will be observed that the hammer is moved in both directions by springs so that if the hammer should be stopped by engagement with the operator, or some other accidental cause the parts will yield so that the operator or machine will not be injured.

W hat I claim as new is 1. In a nailing machine, the combination of a nail-feeding device; asupport for the material to be operated upon; a hammer constructed and arranged to take a nail from the device; carrying means for guiding the hammer from the feeding device to the support; a continuously actuated power mechanism; connecting means actuated by.

the power mechanism for actuating the hammer, said means giving to the hammer a dwell at the feeding device; and a controlling device for the connecting means.

2. In a nailing machine, the combination of a nail-feeding device; a support for the material to be operated upon; a.. hammer constructed and arranged to take a nail from the device; a swinging carrier for the hammer guiding the hammer from the feeding device to the support; a continuously operating power mechanism; connecting means actuated by the power mechanism for actuating the hammer; and a controlling device for the connecting means. i

3. In a nailing machine, the combination of a hammer; a hammer cam for actuating the hammer; a continuously driven power mechanism; a clutch for connecting the power mechanism and the hammer cam; a clutch cam fixed with the hammer cam; a controlling device actuated by the clutch cam to release the clutch with each cycle of the hammer cam; means for throwing the controlling device out of the path of the clutch cam; and a stop fixed with the clutch cam to stop the hammer cam at a pre-determined position. a

4:. In a nailing machine, the combination of a hammer; a hammer cam; devices actuated by the hammer cam for actuating the hammer; a power shaft on which the hammer cam is mounted; a clutch having one member locked with the hammer cam and the other member locked to rotate with the power shaft; a clutch cam fixed to rotate with the hammer cam; and controlling devices actuated by the clutch cam for actuating the clutch.

5. In a nailing machine, the combination of a hammer; a hammer cam; devices actuated by the hammer cam for actuating the hammer; a power shaft on which the hammer cam is mounted; a clutch having one member locked with the hammer cam and the other member locked to rotate with the power shaft; a clutch cam fixed to rotate with the hammer cam; controlling devices actuated by the clutch cam for actuating the clutch; and manually operated means for controlling the action of the controlling devices.

6. In a nailing machine, the combination of two hammers; two hammer cams; a power shaft on which said cams are mounted; clutches on said shaft for locking and releasing said hammer cams from the shaft; latches for actuating the clutches; pedal levers for actuating the latches; and a spring running from eachlatch to the opposite pedal lever for holding the latch and pedal lever in operating position.

7. In a nailing machine, the combination of a hammer; a hammer cam; a shafton which it is mounted; a clutch for connecting and disconnecting the hammer cam from the shaft; a latch; and a controlling device op.- erating on the latch to cause it to throw the clutch into and out of operation comprising a spring operating on the latch for normally holding the latch in operative clutch releasing position and also for actuating the clutch.

8. In a nailing machine, the combination of a hammer; a swinging carrier for the hammer; a nail-feed in the path of the hammer; a material support in the path of the hammer; devices for actuating the hammer; and a cam foroperating said devices, giving to the hammer a dwell at the nailfeed and holding the hammer normally out of contact with the nail-feed.

9. In a nailing machine, the combination of a hammer; a swinging carrier for the hammer; a nail-feed in the path of the hammer; a material support in the path of the hammer; devices giving to the hammer a uniform driving velocity; and a cam for operating said devices giving to the hammer a dwell at the nail-feed and holding the hammer normally out of contact with the nail-feed.

10. In a nailing machine, the combination of a nail feeding device; a swinging hammer having a major portion of its driving force incident to its momentum and having its momentum stopped by the material operated upon, said hammer being constructed and arranged to take a nail from the device AROHIBALD B. 'roznn.

In the presence of R. P. WRIGHT. 

